Improvement in upright piano-forte frames



C. 1? GHEW. Upright-Pianoforte Frame.

Patented Sept. 10,1878,

NITED S'I'ATESPA'IENT OFFICE;

CHARLES F. UHEW, OF BRIDGEPORT, CONNEC'IICUT.

IMPROVEMENT IN UPRIGHT PIANO-FORTE FRAMES.

Specification forming part of Letters Patent N0. 207,947, dated September 10, 1878; applieation filed April 4, 1878.

T0 all whom it may concern:

Be it known that I, CHARLES F. CHEW, of Bridgeport, Oonneetieut, have imented eer ain Improvements in Upright Piano-Forte Frames, of whieh the following is a specificai0u:

It is the object of my irwention te eheapen the construetionof upright piano frames, and espeeially te faeilitate the applieation t0 them of the wrest-plank; and myimention eonsists in providing upon the back side of the castiron frame a seat for a wrest-plank, having a shoulder along its lower edge and ends, and in seeuring the wrest-plank to the back side of the frame by means of serews 0r beits inserted thr0u g11 the frame from the front side.

Tue aceompanying drawings, representing m y i1went-ion, are as follows: Figure 1 is a front; view of the iron frame and the wrest-plank. Fig. 2 is a view of the upper edge of the same, and Fig. 3 is a transverse seetion through a porti0u of the frame on the line 0002 in Figs. 1 and 2.

It will be seen, en referenee to the drawings, that my cast-irou frame, while havng a genera1 resemblanee to an ordina-ry piano-frame, is provided uear its upper end with a flat cross bar, A, and that t11is cross-bar is provided up0u itsbaek side with the projeeting flange a. The f0ur "ertieal bars B B B B of the frame extend upward from the cross-bar A to the upper cross-bar, A.

The wrest-plank C is provided on the lower part of its front side With the shoulder 0, and upon its ends with similar shoulders 0 aud 02.

The upper edge of the erossbar A f0rms a hearing for the shoulder 0, and the baekwardly projecting; fla-nge a forms a hearing for the extreme 10wer edge 0 of the wrest-plank. 'lhat portion of the wrest-plank outside the shoulders c, 0, and 0 bears against the back side of the frame, and is secured thereto by the screws d through the upper portion of the cross-bar A. The wrest-plank is further secured by the serews d through the upper port-ion of the vertieal bars of the frame. The frame has the usual cross-bar A at the bottom.

1t will thus be seen that the wrest-plank is seated on the back side of the frame, and may be easily detached, if occasion arises, by removing the serews from the front side. The wrest-plank is afforded au adequate support to enable it; to resst the pull of the strings by the frontedge of the cross-bar A and the front edge of the fla-nge a 1 claim as my invei1tion- A east-iron frame for upright pianos, pro vded With the flauge a, project-iug baekwardly from the cross-bar A, in eombination with the wrest-plank G, haring the shoulders 0 c 0 and secured to the iron frame by serews iuserted through the frame fr0m its front sde, eonstrueted and arranged t0 operate sub.tau tiaily as shown and described.

0. F. CHEW.

Witnesses:

S. F. POMEROY, G120. W. \VARNER. 

